Probability analysis for influence of time-delay error of detonators on superposed seismic wave vibration reduction
HAN Liang1， LI Hongjiang2， LIU Dianshu3， LING Tianlong3， LI Chen3， LIANG Shufeng3
1.College of Safety Engineering, North China Institute of Science and Technology, Beijing 101601, China;
2.College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China;
3.School of Mechanics & Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Abstract：Based on measured single-hole waveforms at points with different distances, vibration velocity amplitude variations of superposed signals with variation of distance were obtained by using the method of 1ms equal interval double-segment superposition, and the optimal delay time at each measured point was determined.Considering time-delay error of detonators, a probability model was established to quantitatively analyze influence of time-delay error of detonators on seismic wave interference vibration reduction.The results showed that at the measured point with near distance, low segment location detonator has a larger vibration reduction probability, while at the measured point with far distance, high segment location detonator has a larger vibration reduction probability; the distance of the measured point more largely affects the vibration reduction probability of low segment location detonator, but it affects that of high segment location detonator less; in the actual blasting design, the detonator segment number at the blast source can be chosen optimally according to the allowable maximum vibration velocity at different measured points to provide a useful reference for the blasting design.
韩亮1，李红江2，刘殿书3，凌天龙3，李晨3，梁书锋3. 雷管延期误差对地震波叠加降振的概率分析[J]. 振动与冲击, 2019, 38(3): 96-101.
HAN Liang1， LI Hongjiang2， LIU Dianshu3， LING Tianlong3， LI Chen3， LIANG Shufeng3. Probability analysis for influence of time-delay error of detonators on superposed seismic wave vibration reduction. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(3): 96-101.
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